公开(公告)号：CA2256827A1

公开(公告)日：1999-06-19

申请号：CA2256827

申请日：1998-12-18

Applicant: DEGUSSA

Inventor： LEHMANN THOMAS ,  STENKE UDO ,  AUER EMMANUEL ,  BEHL WALTER

IPC: B01J23/40 ,  B01J23/42 ,  B01J23/46 ,  B01J35/00 ,  B01J35/06 ,  H01M4/86 ,  H01M4/88 ,  H01M4/92 ,  H01M8/10 ,  H01M8/1004 ,  H01M8/1018 ,  H01M8/1023 ,  H01M8/1039 ,  H01M8/12 ,  H01M8/02 ,  H01M2/16

Abstract: The invention related to a platinum/ruthenium alloy catalyst that comprises finely-dispersed alloy particles on a powdery, electrically-conductive carrier material, methods of making it, and its use in fuel cells having a polymer electrolyte membrane. The catalyst is particularly resistant to carbon monoxide poisoning when the alloy particles display mean crystallite sizes of 0.5 to 2 nm.

公开(公告)号：CA2356094C

公开(公告)日：2009-08-11

申请号：CA2356094

申请日：2001-08-29

Applicant: DMC2 DEGUSSA METALS CATALYSTS

Inventor： BAYER ARMIN ,  KUHNHOLD HEIKE ,  STENKE UDO ,  ZUBER RALF

IPC: H01M4/86 ,  B60L11/18 ,  H01M2/14 ,  H01M4/96 ,  H01M8/0234 ,  H01M8/0263 ,  H01M8/0273 ,  H01M8/0282 ,  H01M8/1007 ,  H01M8/24 ,  H01M8/242 ,  H01M8/248

Abstract: The invention concerns a PEM fuel cell stack consisting of one or more fuel cells (1) arranged on top of one another, each of which contains a membrane electrode assembly (2) between two electrically conductive bipolar plates (3,4), the surfaces o f which are equipped with flow channels (10) open on one side for the supply of reactive gases, whereby the membrane electrode assemblies each comprise a polymer electrolyt e membrane (5), both sides of which are in contact with a reaction layer (6,7) , whereby the surface area of the reaction layers is smaller than that of the polymer electrolyte membrane and a compressible, coarse-pore gas distribution layer (8,9) made from carbon fibre fabric is inserted between each reaction layer and the adjacent bipolar plates congruent to the reaction layers along with seals (11,12) in the area outside the surface covered by the gas distribution layers, whereby the gas distribution layers in the no-load condition display a thickness D1 and the seals a thickness D2. The P EM fuel cell stack is characterised in that the gas distribution layers in the PEM fuel cell stack are compressed to 25 to 60% of their original thickness.

公开(公告)号：DE19812592A1

公开(公告)日：1999-10-07

申请号：DE19812592

申请日：1998-03-23

Applicant: DEGUSSA

Inventor： ZUBER RALF ,  FEHL KNUT ,  STARZ KARL-ANTON ,  STENKE UDO

IPC: H01M4/86 ,  H01M4/88 ,  H01M4/92 ,  H01M8/1004 ,  H01M8/10 ,  H01M4/90 ,  C09D11/00

Abstract: Ink (I) containing a catalyst, an ionomer and organic solvent, for the production of membrane-electrode units for polymer-electrolyte fuel cells, in which the solvent comprises mono- or poly-hydric alcohols, glycols, glycol ether-alcohols and/or glycol ethers with an evaporation number of more than 600, preferably more than 800. An independent claim is also included for a method for the production of membrane-electrode units by coating a polymer-electrolyte membrane with ink (I) as above.

公开(公告)号：CA2266239A1

公开(公告)日：1999-09-23

申请号：CA2266239

申请日：1999-03-22

Applicant: DEGUSSA

Inventor： FEHL KNUT ,  ZUBER RALF ,  STENKE UDO ,  STARZ KARL-ANTON

IPC: H01M4/86 ,  H01M4/88 ,  H01M4/92 ,  H01M8/1004 ,  H01M4/94

Abstract: The invention relates to a membrane-electrode unit for polymer-electrolyte fuel cells. The membrane-electrode unit consists of a polymer electrolyte membrane and porous reaction layers applied to both sides comprising a catalyst and a proton-conducting polymer, a so-called ionomer. The membrane-electrode unit is characterized in that one part A1 of the catalyst of the reaction layers is saturated with the ionomer and is embedded in the ionomer whereas one part A2 of the catalyst is kept free from the ionomer, where the parts A1 and A2 are in a weight ratio of 1:1 to 20:1.

公开(公告)号：CA2238123A1

公开(公告)日：1998-11-21

申请号：CA2238123

申请日：1998-05-20

Applicant: DEGUSSA

Inventor： STENKE UDO ,  FREUND ANDREAS ,  STARZ KARL-ANTON ,  LEHMANN THOMAS ,  AUER EMMANUEL ,  SCHWARZ ROBERT

IPC: H01M4/88 ,  B01J23/42 ,  B01J23/46 ,  B01J35/02 ,  B01J35/06 ,  H01M4/86 ,  H01M4/92 ,  H01M8/10 ,  H01M8/02

Abstract: The invention relates to a platinum supported catalyst for the anode in a polymer electrode membrane (PEM) fuel cell with high resistance to poisoning by carbon monoxide. The catalyst contains the noble metals platinum and ruthenium on a finely divided, conductive support material. It is characterised in that the two noble metals are not alloyed with each other and are present in highly dispersed form on the support material, wherein the crystallite size of the platinum is less than 2 nm and that of the ruthenium is less than 1 nm.